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For those who want to start experimenting with a fully loaded device ready to go, the M5Stack Core2 is a great option because it includes a ~2-inch color touch screen, soft buttons, 16 MB flash and 8 MB PSRAM, a speaker with I2S amplifier, PDM microphone, 10 programmable LEDs, vibration motor, RTC, microSD slot, lithium battery, 6-axis IMU, M-Bus Socket, and Grove connector for $50 delivered. https://www.amazon.com/dp/B08VGRZYJR M5Stack makes a huge ecosystem of >100 add-on modules that snap onto the bottom of the Core2's form factor, including a wide range of sensors, LoRa & cellular radios, I/Os, interfaces, servo drivers, GPS, cameras, HMDI, RJ45, UWB, RFID, etc. It's quite a clever modular expansion system that makes prototyping (or just playing around) super easy. https://shop.m5stack.com/collections/all-products/m5stack-co... Note: I linked (and have) the AWS IoT Devkit version of the Core2 which comes with an upgraded battery module on the bottom vs the standard Core2 (a bit more Mah plus ten RGB LEDs built-in). It's also $10 cheaper than the base Core2 on Amazon thanks to AWS subsidy. The only difference is it comes with AWS Fire IoT Devkit firmware pre-flashed but it only takes a minute to flash it back to stock Core2 firmware. |